In the US, many pressure-bearing components such as barrels are not controlled parts. You print the frame or lower receiver, then use normal parts that are comp

In the US, many pressure-bearing components such as barrels are not controlled parts. You print the frame or lower receiver, then use normal parts that are compatible. This has been done for MP5s[1], AKs[2], Glocks[3], and even AR-10s in big calibers like .308.[4] Even if barrels required as much effort to get as a complete gun, there are already designs that use no gun parts. The FCG-9[5] is the most popular one. It's actually pretty easy to ECM your own barrel at home. Hundreds of people have built guns like these using zero gun parts.[6] They're reliable and accurate enough that they're being used by Burmese rebels.[7] 1. https://twitter.com/NaviGoBoom/status/1577447210173751296 https://twitter.com/NaviGoBoom/status/1577447210173751296 2. https://twitter.com/NaviGoBoom/status/1577019965458169856 https://twitter.com/NaviGoBoom/status/1577019965458169856 3. https://twitter.com/NaviGoBoom/status/1574237027125559297 https://twitter.com/NaviGoBoom/status/1574237027125559297 4. https://twitter.com/NaviGoBoom/status/1533508555994800128 https://twitter.com/NaviGoBoom/status/1533508555994800128 5. https://en.wikipedia.org/wiki/FGC-9 https://en.wikipedia.org/wiki/FGC-9 6. https://twitter.com/WhichJoeSchmoe/status/1562548244387078144 https://twitter.com/WhichJoeSchmoe/status/156254824438707814... 7. https://twitter.com/jake_hanrahan/status/1468966318317531140 https://twitter.com/jake_hanrahan/status/1468966318317531140